TW200301096A - Absorbent article and method for manufacturing the same - Google Patents

Abstract

An absorbent article 1 comprising a liquid retentive absorbent layer and a liquid impermeable leak preventive layer and including, in its longitudinal direction, an excretion portion facing section A which is placed opposite a wearer's liquid excretion portion, when in wear, and a rear section B which is placed more on the back side than the excretion portion facing section A, when in wear, wherein a leak preventive wall 5 is disposed on opposite side portions in the longitudinal direction, the leak preventive wall 5 comprising a basal wall portion and a planar elastic expansible/contractible portion connected to an upper end portion of the basal wall portion and being raised in the excretion portion facing section A and in the rear section B, and wherein a distance from an upper end portion of the basal wall portion to the leak preventive layer in the rear section is shorter than a comparable distance in the excretion portion facing section A.

Description

20030I0S6 发明. Description of the invention [Technical field to which the invention belongs] The present invention relates to an absorbent article, such as sanitary napkins, adult diapers and the like, and in particular, it relates to an absorbent article which has excellent conformability and liquid leakage resistance. Its excellent characteristics are not deteriorated by wearing. [Prior art] So far known as an absorbent article such as sanitary napkins, adult diapers, etc., which has a leak-proof wall with elastic expandable / contractible parts, expands and contracts in the longitudinal direction, and is flat with the wearer's skin contact. The purpose of the leak-proof wall is to deform an absorbent article in a three-dimensional space shape (especially, in a longitudinal concave cross-sectional shape) so that it fits properly on the wearer and strengthens it with the wearer. The adherence of the skin ensures that liquid leakage is prevented. However, the leak-proof walls of conventional absorbent articles often fall or fall down when worn, so that they cannot fully exhibit the expected functions of their leak-proof walls. This means that sometimes it cannot achieve its excellent fit and leakproofness. Also, Japanese Patent Application No. 8-1 8 2 7 0 2 discloses an absorbent article having a leak-proof wall with a leak-proof surface, and the upper end portion of the wall makes the skin of the wearer appear Plane contact. However, since the leak-proof wall is only located at the portion opposite to the wearer's liquid excretion site, the close-fitting property of the leak-proof wall after the foregoing portion cannot sometimes achieve a satisfactory effect. Therefore, it is an object of the present invention to provide an absorbent article which is excellent in fit and liquid leakage resistance, and its excellent characteristics are not deteriorated by wearing. 7 312 / Invention Specification (Supplement) / 92-〇3 / 91136144 200301096 [Summary of the Invention] The absorbent article of the present invention has achieved the above-mentioned objective by providing an absorbent layer comprising a liquid retentive and A liquid-impermeable leak-proof layer, which includes a draining part facing section facing a wearer's liquid excretion part in a longitudinal direction when worn, and a position higher than the excretion part when worn The opposite section is further behind, in which the leak-proof wall is disposed at the opposite side portion in the longitudinal direction. The leak-proof wall includes a basal wall portion and a plane elastically expandable / contractable connected to the upper end portion of the base wall portion. Part, and bulge in the facing part of the excretion part and in the rear part, and the distance from the upper end part of the foundation wall part to the leak-proof layer in the rear part is shorter than the considerable distance in the facing part of the excretion part . At the same time, the present invention has achieved the above object, by providing a method for manufacturing an absorbent article, the absorbent article includes a liquid-retaining absorbent layer, a liquid-impermeable leak-proof layer, and an opposite edge of the absorbent layer The leak-proof wall includes a foundation wall portion and a planar elastically expandable / contractible portion connected to the upper end portion of the foundation wall portion. When worn, it bulges in the excretory portion facing the segment. Opposite the wearer's liquid excretion site and a rear section, when worn, it is placed further behind than the excretion site facing section, where the distance from the upper end portion of the foundation wall portion to the leak-proof layer of the rear section is smaller than A considerable distance in the facing section of the excretion site is short. The method for manufacturing an absorbent article includes a step of manufacturing a main body that includes the absorbent layer or the absorbent layer and the leak-proof layer; The step of expanding / shrinking a member, the member includes a foundation wall portion forming a sheet portion 'which has a certain width in the longitudinal direction, and the base 8 312 / invention Book (Supplement) / 92-03 / 91136144 200301096 The base wall part forms an elastically expandable / shrinkable part of one end part of the sheet part; and a base wall part of the elastically expandable / shrinkable member forms a sheet part to The step of the opposite side portion of the main body, such that the fixed position of the wide side direction of the sheet portion at the excretory portion facing the base wall portion in the section and the wide side direction of the sheet portion at the base wall portion in the rear portion The fixed position can be distinguished. Also, the present invention has achieved the above object, by providing a method for manufacturing an absorbent article, the absorbent article includes a liquid-retaining absorbent layer, a liquid-impermeable leak-proof layer, and an opposite side of the absorbent layer. A leak-proof wall on the edge, the leak-proof wall includes a foundation wall portion and a planar elastic expandable / contractible portion connected to the upper end portion of the foundation wall portion, and the excretory portion faces the middle portion when worn. The bulge is placed opposite the wearer's excretion liquid 'and a rear section, and when worn, it is placed further behind than the excretory part's facing section, and from the upper end of the foundation wall portion to the leak-proof layer in the rear section. The distance is shorter than one of the facing sections of the excretory part. The method for manufacturing an absorbent article includes a step of manufacturing a main body that includes the absorbing layer or the absorbing layer and the leak-proof layer; A step of manufacturing an elastically expandable / contractible member, the member including a foundation wall portion forming a sheet portion 'having a certain width in a longitudinal direction, and a connection to the foundation wall in a wide side direction An elastically expandable / shrinkable portion formed at one end portion of the sheet portion; one that fixes the elastically expandable / shrinkable member to an opposite side portion of the main body at the other end of the base wall portion forming the sheet portion, or in the vicinity thereof Step of the zone;-forming a sheet portion on the area of the base wall portion of the elastically expandable / contractible member of the rear section, forming a layer having the bullet 9 312 / Invention Specification (Supplement) / 92-03 / 91136144 200301096 And a step of fixing the longitudinally opposite end portions of the elastic expandable / contractible member to the main body. [Embodiment] The present invention will be described mainly by taking specific examples. Fig. 1 shows a plan view of a sanitary napkin according to a first specific example of the present invention 'when viewed from its top sheet. Fig. 2 (a) and Fig. 2 (b) schematically show the sections of a leak-proof wall of different parts of the sanitary napkin of Fig. 1, and Fig. 3 is a perspective view of the sanitary napkin of Fig. 1. As shown in Figs. 1 to 3, the sanitary napkin 1 of this specific example includes a liquid-retaining absorption layer E and a liquid-impermeable leak-proof layer F. The absorbent layer E includes a liquid-impermeable top sheet 2 and a liquid-retaining absorbent core 4, and the leak-proof layer F includes a liquid-impermeable back sheet 3. The absorption core 4 is inserted between the top sheet 2 and the back sheet 3. The top sheet 2 covers the entire area of the upper surface of the absorbent core 4 and one edge edge of the absorbent core 4, and then bends toward the back sheet edge. The back sheet 3 covers the lower surface of the absorbent core 4. The back sheet 3 extends outward from the edges of the sides of the absorbent core 4 to form a side drop 6. The side drop 6 further expands outward at a position facing the section A at the excretion site, thereby forming a pair of wings 7. The top sheet 2 and the back sheet 3 are respectively expanded from the rear end before the absorbent core 4 and are joined at the expanded portion, thereby forming an end closed portion 8. The absorption core 4 and the top sheet 2 are integrated and compacted to form a leak-proof groove 8 on the side of the top sheet 2 of the absorption core 4. 10 312 / Invention Specification (Supplement) / 92-03 / 91136144 200301096 The sanitary napkin 1 includes, in the longitudinal direction, the excretion site facing segment A (located opposite the wearer's liquid excretion site at the time of wearing), A rear segment B (more backward than the excretion site facing segment A toward the wearer's back when worn), and an end segment C and a rear 5 and segment D 'which respectively form one of the front end of the sanitary napkin 1 and A back-end segment. In this specific example, the excretion site facing the boundary between the segment A and the rear segment B is located at about the center portion of the tampon 1 in the longitudinal direction. Each of the wings 7 'in this specific example is folded and fixed on the outer surface of a pair of pants such as shorts by an adhesive or the like when worn. The rear section B of the sanitary napkin 1 in the first and third specific examples is a part of the base 71 (see FIG. 1) on the side of the wing after leaving the sanitary napkin i, which is about 2 cm or more. It is preferably 3 cm or more. The distance between the rear section b and the base portion 71 of the wing is indicated by L in FIG. The sanitary napkin 1 has a pair of leak-proof walls 5, 5 at the longitudinally opposite end portions thereof, and is placed in the longitudinal direction. The leakproof wall 5 is located in the area between the inner end of the front end section and the rear end sections C and D of the sanitary napkin 1 respectively. The leak-proof wall 5, as shown in FIG. 2, is formed by a base wall portion 51 bulging from the edge of one side of the absorbing core 4 and a plane elasticity connecting / extensible to the upper end portion of the base wall portion 51. The constricted part is composed of 5 2. The elastically expandable / shrinkable portion 52 is provided with an elastic member 9 which is placed in the longitudinal direction of the sanitary cotton 1 and is therefore elastically expandable / shrinkable. The leak-proof wall 5 is placed on the longitudinal edge of the absorption layer E, and includes the top sheet 2 and the absorption core 4. The upper surface of one of the elastic expandable / contractible portions 5 2 (the surface in contact with the skin) and the upper surface of the absorbent layer E (in contact with the skin of 11 312 / Invention Specification (Supplement) / 92-03 / 91136144 200301096) Surface) parallel. The elastically expandable / contractible portion 52 is in plane contact with the skin of the wearer at least at the excretory site-facing section A plane. The elastic expandable / contractible portion 52 is connected to the upper end portion P of the foundation wall portion 51 in a shape of a T-section. That is, the elastically expandable / contractible portion 52 includes an inwardly extending region 52a extending inward from the upper end portion P of the base wall portion 51 in the direction of the wide side of the sanitary napkin 1, and an outwardly extending region 5 2b It extends outward from the upper end portion p of the foundation wall portion 51 in the direction of the wide side of the sanitary napkin 1. The extension widths of the extension regions 52a, 52b are generally equal. These extensions 5 2 a, 5 2 b are provided with three linear elastic members 9 which are separated from each other. The elastic member 9 is placed at least in the facing section A and the rear section B of the excretion portion of the sanitary napkin 1. The leak-proof wall 5 of the sanitary napkin 1 in this specific example faces the A and B in the excretion portion at the excretion site, and is wide due to the elastically expandable / contractable portion 52 (inwardly extending region 52a) At least a part of the inner side is fixed to the relationship of the top surface sheet 2, and there is no bulge (no bulge) in the front end section C and the rear end section D. The elastically expandable / contractable portion 5 2 is an outer portion of the longitudinally opposite end of the area fixed to the top sheet 2 and the end closing portion 8 at the bulge of the leakproof wall 5, and the elastically expandable / The wide inner side of the shrinkable portion is not fixed on the top sheet 2. The elastically expandable / contractible portion 5 2 is contracted, and as shown in FIG. 3, the sanitary napkin 1 is folded in a recessed manner with its longitudinal summary structure. In this specific example, the leakproof wall 5 of the sanitary napkin 1 is from the base end portion 5; [12 312 / Invention Specification (Supplement) / 92-〇3 / 9 丨 136144 200301096 The upper end portion P is in the rear section B The distance of the back sheet (leak-proof layer) 3 (a straight line in a natural state, see FIG. 2 (b)), L2, is a considerable distance from the excretory part facing section A (see L1 in FIG. 2 (a)). ) Shorter in length. According to the sanitary napkin of this specific example, since the leak-proof wall 5 bulges in the facing section A and the rear section B of the excretion site, the following effects can be obtained. (1) Even if the liquid discharged to the excretion site facing the section A flows backward, the liquid is prevented from leaking to the side by the leakage prevention wall 5 of the rear section B. (2) At the same time, even if the liquid discharged to the excretion site facing the section A flows sideways, it cannot cross the leakproof wall 5, and it will flow backward and be absorbed by the adjacent absorption core. Therefore, leakage prevention can be achieved by effectively utilizing the absorption force of the absorption core. This effect is even more pronounced when the leak-proof wall 5 continuously bulges from the excretion portion facing the section A to the rear section B. Further, according to the sanitary napkin of this specific example, since the distance L 2 in the rear section B is shorter than the distance L 1 of the excretory part facing the section A, the following effects can be obtained. (3) The applicability of the sanitary napkin 1 (especially the buttocks of the wearer or the vicinity of the hips) is improved, and the sanitary napkin is easily adhered to the body of the wearer, thus making it uncomfortable Feeling lowered. That is, the curve of the body line (curve) of the wearer at the liquid excretion site and the rear side (hips side) closer to the wearer are not constant, and the curvature in the liquid excretion site is smaller. In this specific example, because the distance L 2 at the rear section B is made smaller than the distance L 1 facing the section A at the excretion site, the degree (curvature) of the curve of the tampon in the rear section B and the tampon The degree (curvature) of facing the curve in section A at the excretion site can be easily and effectively divided into 13 312 / Invention Specification (Supplement) / 92-03 / 91136144 200301096 points, and the overall structure of the sanitary napkin can be made more convenient by this. Appropriate to fit the curve of the wearer's body. In order to increase its leak-proof ability, 'If a leak-proof wall is also provided to the rear section, it only has the ability of elastic expansion / contraction, and the curve degree of the sanitary napkin generally increases too much in the rear section. Will reduce its conformability. Therefore, in the conventional absorbent article, no leak-proof wall is provided at the rear stage. However, in this specific example, the height of the leak-proof wall in the section facing the excretion portion is different from the height of the leak-proof wall in the rear section, so that it can be compatible with the leak-proof ability. In particular, the leak-proof wall 5 of this specific example has a T-shaped cross-section structure including the inwardly extending region 5 2 a and the outwardly extending region 5 2 b, and the following effects can be obtained (4). (4) Since the upper end portion of the leak-proof wall (elastic expandable / contractible portion 5 2) is provided, the conformability to the wearer's body is enhanced, and the shape stability of the leak-proof wall is improved, so Improve the leak-proof effect mentioned above. From the viewpoint of ensuring the effects (1) to (3) mentioned above, 'in the excretory portion facing section A, from the base end portion 51 to the upper end portion P to the back sheet (leak-proof layer) The distance L 1 of 3 is from the upper end portion P of the base end portion 51 to the back sheet (the distance L2 of the leak-proof layer P in the rear section B, and the ratio (L1 / L2) thereof is preferably 1.2 to 6.0, In particular, it is preferably between 1.5 and 3.0. Also, from the viewpoint of leakage prevention, in the vicinity of the liquid excretion site, the distance L 1 is preferably 5 to 50 mm, especially 10 to 4 0 mm is better. Similarly, from the viewpoint of feeling of use and leakage prevention, the distance 312 / Invention Specification (Supplement) / 92-03 / 91136144 14

20030I09G L 2 is preferably 2 to 40 m m, and particularly preferably 5 to 30 m m. Also, (the elastic expandable / contractible portion 52) a width distance W (see FIG. 2 (a)) (between the end of the inwardly extending region 52a and the end of the outwardly extending region 52b), preferably It is 6 to 40 mm, and from the standpoint of conformability to the wearer's body and side leakage prevention, 10 to 30 mm is particularly preferable. The leak-proof wall 5 of this specific example is formed by fixing an elastically expandable / contractible member 50 to another component of the sanitary napkin 1 (the top sheet 2, the back sheet 3, and the like). It includes, as shown in FIG. 4, a base wall portion having a fixed width W2 in the longitudinal direction to form a sheet portion 53, and a base wall portion in a shape connected to the T section to form a sheet portion 53 in the broad side direction The elastically expandable / collapsible portion of the upper end portion 5 4 is 5 2 ° It should be noted that the broad side direction of the base wall portion forming the sheet portion means that the base wall portion forming the sheet portion has a longitudinal direction and a wide side Direction, and it is different from the wide edge direction of the tampon (absorbent article).

More particularly, in the excretory portion facing the section A, the base wall portion of the elastically expandable / contractible member 50 forms the other end portion of the sheet portion 53 (located on the side of the elastically expandable / contractible portion 52). The opposite end portion of the end portion 54), as shown in FIG. 2 (a), is bent toward the lower surface edge of the absorbent core 4 between the edge portion 21 of the top sheet 2 and the back sheet 3 ( It also bends towards the lower surface edge of the absorbent core 4) and is fixed by a known bonding technique such as an adhesive 12 or the like. The base wall part forms a sheet part 5 3 at a fixed position in the wide side direction of the excretion part facing the segment A, and is tied near the other end part 5 5 and faces the segment A 15 312 / invention specification at the excretion part ( Supplementary) / 92-03 / 9113 6144 200301096 The lower end portion Q of the foundation wall portion 51 is formed at the position shown in Fig. 2 (a). In the rear section B, the base portion of the elastically expandable / contractable member 50 forms a sheet portion 53 series, as shown in FIG. 2 (b), fixed on the upper surface edge of the absorbent core 4, located at The end portion 54 and the other end portion 55 are located close to the end portion 54, and are joined by a known method such as thermal closing} 3. In the rear section B, the base wall part forms a fixed position of the thin part 5 3 in the wide side direction, which is located near the thin part 5 3 and the other end part 5 5 is close to the end part 5 4. In the rear section B, the lower end portion Q of the foundation wall portion 51 is formed at the position shown in FIG. 2 (b). A multi-layer portion 58 is formed on a part of the foundation wall portion forming sheet portion 5 3 in the rear section B. The multiple layers 58 are provided at a position of the foundation wall portion forming a thin portion 53, which is formed by folding a portion of the foundation wall portion forming a thin portion 53 in a manner of at least doubling, and by Adhesives, heat seals, etc. maintain the folded state. However, the multi-layer 58 does not include the elastically expandable / contractible portion of the multi-layer portion formed by folding the base wall portion to form a thin portion 53, as shown in FIGS. 6 (a) and 9 (c). As shown. As shown in FIG. 2 (b), the foundation wall part forms a fixed position in the width direction of the sheet part 53, and the sheet wall part 53 is formed at the base wall part at a plurality of points and fixed to another constituent member (the top sheet) (3, back sheet, etc.) The top position refers to the fixed position of the base wall part 5 1 The lower end part q is the closest to the end at the 52 sides of the elastic expandable / contractible part 16 312 / invention Instruction (Supplement) / 92-03 / 91136144 200301096 Part 5 4 fixed position. In this specific example, from a manufacturing standpoint, the leak-proof wall is formed using the elastic expandable / contractible member 50, which is flush with the width of the base wall portion forming sheet portion 53 in the longitudinal direction. And by separately fixing the fixed part of the sheet part 53, the distance L2 between the upper end part P of the foundation wall part and the leak-proof layer F in the rear section B is equivalent to that facing the section A at the excretion site. The distance L1 is short. As discussed above, in this specific example, because the distance L2 between the upper end portion P of the foundation wall portion 5 1 and the back sheet (leak-proof layer) 3 in the rear section B, the foundation wall is formed into a sheet The fixed position of the part 5 3 in the wide side direction in the excretory part facing the segment A and the base wall forming a thin part, respectively. The fixed position of the part 5 3 in the rear part B is separated, so that the distance L2 is greater than The considerable distance L 1 is short, so that the distance from the lower end portion Q to the upper end portion P of the foundation wall portion 51 in the rear section B is shorter than the considerable distance facing the section A at the excretion site, and it is manufactured In other words, it is easier than fixing the elastically expandable / contractible member, because the width of the base wall portion forming the sheet portion in the longitudinal direction will change. In addition, this structure makes the distance L2 between the upper end portion P of the foundation wall portion and the back sheet (leak-proof layer) 3 in the rear section C smaller than the considerable distance L1 facing the section A at the excretion site. In the sanitary napkin 1 in this specific example, as shown in FIGS. 1 and 3, a leak-proof sheet 10 is placed at the skin-contacting surface edge of the rear end section D of the sanitary napkin 1 in the longitudinal direction, and The leaking sheet 10 is fixed to the elastically expandable / contractable portion 52 of the raised leakproof wall 5 so as to be placed on the longitudinal center edge of the sanitary napkin 1 17 312 / Invention Specification (Supplement) / 92-03 / 91136144 200301096 An edge portion 10 a of the leak-proof sheet 10 is separated from the top sheet (absorptive layer) 2. By placing the leak-proof sheet 10, a pocket-like space is formed at the rear portion 'and the pocket-like space can prevent the liquid that has flowed backward from leaking out. Because the pocket is fixed to the elastically expandable / contractable portion of the leak-proof wall, when the leak-proof wall is raised, the pocket is separated from the top sheet (at least the inner edge portion of the wide edge direction is connected to the top The sheet is separated), so it is difficult to squeeze. The leak-proof sheet 10 is fixed near the opposite end portion of the sanitary napkin in the direction of the wide side in the place indicated by the component symbol ii in FIG. I, using a known joining method (adhesive, heat sealing, etc.), And in the longitudinal direction of the sanitary napkin, the whole is fixed to the end closing portion 8. The manufacturing method of the sanitary napkin 1 of this specific example includes, for example, a step of manufacturing the main body of the absorbent layer of the package; a step of manufacturing the elastically expandable / contractable member 50 (see FIG. 4); The step of fixing / expanding / retractable member 50's foundation wall portion to form sheet portion 5 3 to the opposite side portion of the main body such that, as shown in FIGS. 2 (a) and 2 (b), 'face the segment A at the excretion site The base wall portion forming a fixed position in the wide side direction in the sheet portion 53 may be separated from a fixed position in the wide side direction in the base wall portion forming the sheet portion 5 3 in the rear section B; and the elasticity may be expanded A step of fixing the longitudinally opposite end portions of the retractable member 50 to the main body; and a step of fixing the leak-proof layer F to the main body including the absorbing layer. In the step of fixing the foundation wall portion into a sheet portion 5 3 on the opposite side portion of the main body, the end portion 5 5 or the foundation wall portion is shaped 312 / Invention Specification (Supplement) / 92-03 / 91136144 18 200301096 into the vicinity of the thin section, fixed in the body to form a part of the excretory part facing the section A and the rear section B, except for the fixed end portion 5 5 or the other portion of the thin portion 5 3 in the vicinity thereof, It can be fixed to the part which forms this back stage B in a main body. It can also be fixed in the reverse order. Also, although the multiple portion 58 may be formed in the step of fixing the foundation wall portion forming the sheet portion 53 to the main body, it is formed in the step of forming the elastically expandable / contractable member 50. It is preferable that the wall portion forms the rear section B of the sheet portion 53. At the same time, if the main body contains the absorbing layer E and the leak-proof layer (back sheet 3) F, it has been prepared first, and then the foundation wall part is formed into a sheet part 5 3 and fixed to the main body's absorption layer E and / Or on the leak-proof layer F, it is also acceptable. At this time, the end portion 55 is fixed to the leak-proof layer F, and the layer F extends more outwardly than the absorption layer E in the broad side direction, instead of being fixed to the absorption layer E as shown in FIG. 2. the next part. Materials for forming the sanitary napkin of this embodiment will now be described. The top sheet 2, the absorbent core 4, the back sheet 3, the leak-proof sheet 10, and the sheet of the elastically expandable / contractable member 50 forming the leak-proof wall 5 and the elastic member 9, can use conventional absorbency There are no restrictions on articles such as sanitary napkins, adult diapers or the like. It should be noted that the back sheet may be a single-layer sheet or a laminated sheet, and the thin-layer sheet may be a combination product of a liquid-impermeable sheet and a liquid-permeable sheet. If the elastic member 9 is not used, the composition of the elastically expandable / shrinkable portion 5 2 may be made of a film having expandable / shrinkable properties or a non-woven fabric, a thin-layer material film having expandable / shrinkable properties, and a non-woven fabric. 19 3] 2 / Invention Specification (Supplement) / 92-03 / 91136144 200301096 Uniform treatment to provide expandable / shrinkable properties of films without expandable / shrinkable properties, etc. At the same time, the foundation wall part can have expandable / shrinkable properties, as in the elastically expandable / shrinkable part. Although the leak-proof wall of the specific example is formed of an elastically expandable / shrinkable material, wherein the foundation wall portion is formed into a sheet portion and an elastically expandable / shrinkable portion is connected to each other as a whole, if the foundation wall is separately manufactured It is also acceptable to form a sheet portion and an elastic expandable / shrinkable portion in part, and then obtain an elastic expandable / shrinkable material by using a joint to form a leakproof wall. Next, a sanitary cotton 1 according to a second specific example of the present invention will be described with reference to Figs. 5 to 7. Regarding the sanitary napkin 1 of the second specific example, only the differences from the sanitary napkin 1 mentioned above will be described, and the same points will be omitted. From this point of view, although it will not be specifically described, the description about the sanitary napkin 1 mentioned above can still be applied where appropriate. In one specific example of the sanitary napkin 1 ′, a leak-proof wall 5 includes, as shown in FIGS. 5 and 7, where the leak-proof wall 5 is not raised, between an excretion site facing the sections A and 1. Between the rear section B is the central fixed part 5 6. In the central fixing portion 56 ', as shown in FIG. 6 (a), because the entire wide-area-direction area is fixed to a top sheet 2 by a known method such as heat sealing 13 or the like. A back sheet 3, an elastic expandable / contractible portion 5 2 does not bulge (no bulge). Also, as shown in Fig. 6 (b), a multi-layered portion 58 is formed on a portion of the base wall portion forming a thin-sheet portion 53 in the rear section B. It should be noted that the elastically expandable / expandable 20/312 / Invention Specification (Supplement) / 92 · 03/91136144 200301096 in the central fixing portion 5 6 can only be inside the narrow side ( The inwardly extending area is fixed to the top sheet 2. The sanitary napkin 1 '' according to the first specific example can exhibit the same functions and effects as the sanitary napkin of the first specific example, and further includes the central fixing portion 5 6 . In this way, because the elastic expandable / contractable stress of the elastic member in the area facing the section a of the excretion site has not been transmitted to the area in the rear section B, the side edges and backward leakage prevention can be prevented. The strengthening effect of each other without hindering each other. That is, although the elastically expandable / contractible portion in the excretory portion faces the segment A, it is stressed by movements such as walking and leg opening / closing due to the central fixed portion In the presence of 56, the stress will not be transmitted to the rear section B. In this way, the leak-proof wall 5 in the rear section B can be maintained in a stable state without being affected by the action of the legs. Also, in this second specific example In the tampon 1 'in, such as As shown in 6 (b), on the outer side of the elastic expandable / contractible portion 5 2 in the rear section B, a side end portion 5 7 is fixed to a back sheet 3 (side drop 6). On the other hand, it extends more than one of the edge edges of an absorbent core 4. Due to the above features, the inner edge (inwardly extending area 52a) of the elastic expandable / contractible portion 52 in the wide side direction must be able to Bulges, and thus forms a pocket between the elastically expandable / contractible portion 52 and the top sheet 2 and is not easily crushed even when the wearer applies a wearing pressure during wearing. Also Because the outwardly extending region 5 2b is connected to the back sheet 3, the leakage of liquid can be further reduced. Next, referring to FIGS. 8 to 10, a third specific example 21 312 / Invention Specification (Supplementary) Pieces) / 92-03 / 91136M4 200301096 sanitary napkin 1 ". Regarding the third specific example of sanitary napkin 1", only the differences from the above-mentioned sanitary napkin 1 will be explained, and the same parts are omitted. According to these views , Although it is not specifically stated, it is related to the sanitary napkin 1 described above It can be applied where appropriate. In this specific example, a leak-proof wall 5 has an inwardly extending area 52a and an outwardly extending area 5 2 b. The difference between it and the portion 5 2 a lies in its extending area. The ratio of the width of the extension region 52a to the extension region 52b (the former: the latter) is about 3: 2 to 5: 1. A pair of leak-proof walls 5, 5 are along the longitudinal opposite edges of an absorption layer E The layer e includes a top sheet 2 and an absorbent core 4. Each leak-proof wall 5 in this specific example is fixed to the elastic expandable / contractible member 50 'by The sanitary napkin 1 ”is formed on another constituent member (the top sheet 2, the back sheet 3 and the like), as shown in FIGS. 9 (a) to 9 (c). The elastically expandable / shrinkable member 50 'has the same structure as the elastically expandable / shrinkable member 50 described above, and only forms a sheet with respect to one of the foundation wall portions of one elastically expandable / shrinkable portion 52. Part 5 3 has different connection positions. One of the elastic expandable / contractible members 5 0 ′ forms a sheet portion 5 3 as a base wall portion, and is fixed to the elastic expandable / contractible portion 5 2 near an end portion 5 4 on the side opposite to one of the end portions 5 5. The region, which is located between one side portion 21 of the top sheet 2 and the back sheet 3, is fixed by a known bonding method such as an adhesive 12 as shown in Figs. 9 (a) to 9 (c) The following table 22 312 / Invention Specification (Supplement) / 92-03 / 91136144 200301096 on the front end C and rear end D of one of the sanitary napkins 1 ". In the segment C and the rear segment D, the elastically expandable / contractible portion 5 2 ′ is fixed at least in the wide side (the inwardly extending region 5 2㈧ is fixed to the top sheet 2. By being located in a rear segment B, A multi-layer portion 5 8 is provided for a foundation wall portion 51 of the elastically expandable / contractible member 50, as shown in FIG. 9 (b). Part 5; [The distance L 2 between the upper end part P and the back sheet 3 (leak-proof layer ρ) is smaller than one of the excretory parts facing the segment A l1, see Fig. 9 (a). That is, 'In the third specific example, from the manufacturing point of view, the leakproof wall is formed using the elastically expandable / contractible member 50, which is related to the The foundation wall portion forms a sheet portion 5 3 whose width in the longitudinal direction is flush, and by providing the multiple layers 5 8 to the foundation wall portion in the rear section b, the sheet portion 5 3 is formed so as to extend from the upper end portion of the foundation wall portion. The distance L2 from ρ to the leak-proof layer ρ is less than a considerable distance l 1 of the facing portion a of the excretion site. It should be noted that the multi-layer 5 8 is formed by folding the foundation wall portion to form a sheet portion 5 3 A part of the width direction of the sheet is formed so that the faces on the same side of the sheet part are opposite to each other, and then the faces facing each other are joined by a known method such as an adhesive, heat sealing, etc. The multiple layer 5 The 8 series is formed in a predetermined length in one of the longitudinal directions of the elastic expandable / contractible member 5 j ′. In the longitudinal direction of the sanitary napkin 1, ′, the length L3 of the portion formed by the multiple layers 58 is, It is preferably the sum of the bulges of the leakproof wall 5. 15 to 45 percent of the degree of L4, especially 20 to 30 percent (see Figure 8). The sanitary napkin 1 of this specific example can be made by an absorbent article 23 312 / The method of the invention specification (Supplement) / 92-03 / 91136144 200301096 is manufactured more efficiently, for example, a step of manufacturing the main body including the absorbing layer E or the absorbing layer E and the leak-proof layer F; a manufacturing elasticity can be expanded / The step of retracting a member 50 'includes a base wall portion having a certain longitudinal width to form a sheet portion 5 3, and an elastic portion that is connected to the base wall portion to form a sheet portion 5 3 in a wide side direction is expandable. / Shrinkable part 5 2; —Fix the elastically expandable / shrinkable member 50 ′ to the opposite side part of the main body, and form a sheet part 5 3 at the other end part of the base wall part 5 5 or a nearby area A step of forming a multi-layer 5 8 having a predetermined longitudinal length on the elastically expandable / shrinkable member 50 0, and forming a sheet 5 3 on the foundation wall portion of the elastically expandable / shrinkable member 50 0 ′ Steps on the area, that elasticity The expandable / contractable member 50 is located in the rear section B; and a step of fixing the longitudinally opposite end portions of the elastic expandable / contractible member 50 to the main body. In one preferred manufacturing method of the sanitary napkin 1 "in this specific example, the steps of manufacturing a main body including an absorbent layer E by integrating a top sheet 2 and an absorbent core 4 and manufacturing a The step of forming the elastically expandable / shrinkable member 50 of the sheet portion 5 3 with a certain longitudinal width of the foundation wall portion, and the elastically expandable / shrinkable portion 52 of the end portion connected to the sheet portion 53 in the wide direction. In the manufacturing steps of the elastically expandable / contractible member 50 ′, a multiple layer 58 is formed on the foundation wall portion in the rear section b to form a sheet. On the part of the elastically expandable / contractible member 50, the predetermined length in the longitudinal direction. Then, as shown in Figs. 9 (a) to 9 (c), the following steps are performed in sequence: 24 312 / Description of the Invention (Supplement) / 92-03 / 91136144 00301096 The elastically expandable / contractible member 50, forming a sheet layer 53 at or near the base wall portion, fixed to the opposite side of the absorbent layer (main body) Edge part Steps; steps of integrating the main body including the absorption layer E and the leak-proof layer (back sheet 3) F; and fixing the elastically expandable / shrinkable member 50, the longitudinally opposite end portions 50a, 50b to the absorption layer ( Main body) E. In the sanitary napkin 1 "obtained by this method, the two parts 50 A have no multiple layers 58 formed thereon, and the part 50B has multiple layers 58 formed thereon. Is formed between the opposite end portions 50a and 50b of the elastically expandable / contractible member 50a. If the main body containing the absorbing layer E is not manufactured and then the foundation wall portion is formed to form a thin plate portion 5 3 at the other end portion 5 5 to the edge-saving portion of the absorbing layer E, as described above, the manufacturing method will first include the The main body of the absorption layer E and the leak-proof layer (back sheet 3) F is manufactured, and then the foundation wall part is formed into the other end part 5 5 of the sheet part 5 3 or the vicinity thereof, and is fixed to the absorption layer E of the main body. And / or the leak-proof layer F is also an acceptable method. At the same time, it is also acceptable to form the multi-layer portion 58 before the multi-layer portion 58 is fixed to the main body including the absorption layer E, or the absorption layer E and the leak-proof layer F. The elastically expandable / contractible member is above 50 ′. Another concern is that after the elastically expandable / contractible layer is fixed on the opposite edge portion of the main body, a multi-layer portion 58 is formed thereon. The preferred packing method for the sanitary napkin 1 in this specific example is to pack it individually and sell it. The following example can get a single packing item (item packing) of tampon 1, '. 25 312 / Invention Specification (Supplement) / 92-03 / 91136144 200301096 First, as shown in Figure Π (a), the sanitary napkin 1 "is placed on a packing material 1 4. At the same time, it is used to fix the wing part 7 to the outer surface of the underwear, such as an adhesive portion 71 such as shorts, covered with a tearable sheet (not shown), and continue to protect until the use of the sanitary napkin. Then, place it in the packaging material 1 The sanitary napkin 1 "on 4 is folded in a longitudinal direction along a folding line La, the line (the direction of the wide edge of the sanitary napkin) is wide along the rear section B near the rear section D Edge direction. Then, as shown in Fig. H (b), the sanitary napkin 1 "is folded in the longitudinal direction along the folding line Lb, which extends near the boundary between the facing section A and the rear section B of the excretion site, along the width It extends in the longitudinal direction along a folding line Lc, which extends in the width direction near the boundary between the front end section C and the excretory part facing section A. Then the packaging material 14 The opposite edge portion extends outward from the opposite edge of the sanitary napkin 1 "along the wide direction. The folded sanitary napkin 1" is closed by a known method such as embossing or the like. And attach one of the packing materials 14 to a predetermined position 15. In this way, the packaging item of the sanitary napkin 1 "can be obtained, as shown in Figure 1 1 (c). In this specific example, the leakproof wall 5 of the sanitary napkin 1 "does not bulge at the overlapping portion of the folding line La near the back end D. The folding lines La to L c are formed in order to obtain a packing item. That is, the leak-proof wall 5 is fixed at least in the widthwise inner side (inwardly extending region 5 2 a) of the elastically expandable / contractable portion 5 2 at a portion overlapping the folding line La. On the top surface 26 312 / Invention Specification (Supplement) / 92-03 / 91136144 200301096 Sheet 2 does not bulge (no bulge). By providing an end portion on the rear edge of the sanitary napkin, the leakproof A part of the wall 5 is raised up to a point where the folding line La is not reached, and a length from the upper end portion P of the base wall portion 51 to the leak-proof layer (back sheet 3) and a low portion is provided. The distance can provide a part to truly show the reinforcing effect of the conformity. That is, if the part of the bulge of the leak-proof wall 5 and the measure line La Zhongfeng 'are on the upper surface of the leak-proof wall 5 (skin Height difference between the contact surface) and the upper surface (skin contact surface) of the absorbent layer E, since the The folding habit of the folding portion of the folding line La causes a large height difference. This may cause it to fail to fully display the effect, or it is necessary to reduce the height of the leak-proof wall in the rear section B. However, by design The inconvenience can be avoided if the leak-proof wall 5 has no raised portions (50 A and / or 5 O B) not overlapping the fold line La, according to the sanitary napkin 1 of this specific example. The same effect as that of the sanitary napkin 1 mentioned above is obtained. Moreover, according to the manufacturing method of the sanitary napkin 1 "provided above, the sanitary napkin 1" can be easily and economically manufactured. It should be noted that the present invention is not limited to the specific examples mentioned above, and changes and modifications can be made without departing from the object of the present invention. For example, when using the T-shaped leak-proof wall, the extension widths of the inwardly extending region 5 2 a and the outwardly extending region 52 b may be the same or different. It is also acceptable if the extended width of the outwardly extending region 5 2b is large. Also, the leakproof wall may have a cross-sectional structure as shown in Fig. 12 (a) or 12 (b). The element symbol 12 in Figs. 12 (a) and 12 (b) represents an adhesive used to bond the sheets. 27 312 / Invention Specification (Supplement) / 92-03 / 91136144 200301096

I

I The multi-layer portion 5 8 in the third specific example can be formed by folding the base wall portion to form a part of the sheet portion 53 so that the sheet portion 5 3 faces the sanitary napkin in the width direction toward the outside. The surfaces of each other face each other and then combine the surfaces that face each other. In the sanitary napkins of the specific examples described above, although the leak-proof wall is formed using an elastic expandable / contractible member, the width of the member in the longitudinal direction is equal to that of the thin wall portion of the base wall portion. It is also acceptable if the width of the material of the foundation wall portion forming the sheet portion in the rear section B is shorter than the width of the foundation wall portion forming the sheet portion facing the section A at the excretion portion. In addition, the leak-proof wall may be designed such that the sheet portion formed by adjusting the base wall portion is fixed in the wide side direction, and by increasing the width of the multi-layer portion and the joint width, or increasing The number of middle layers in the heavy layer is reduced by the distance L 2 in the rear section B toward the rear section D.

In the sanitary napkin 1 of the first specific example, as shown in FIG. 2 (b), by fixing the elastically expandable / contractible member 50 to the absorbent core in the rear section, the foundation wall portion forms a sheet portion. The fixed position in the wide side direction of the excretion site facing the segment A is distinguished from the wide side direction position in which the base wall part forms a sheet part in the rear part B. By fixing the elastically expandable / contractible member 50 in the rear section B to the leak-proof layer (back sheet 3) F in the outer region of the absorption layer F, the foundation wall portion forms a sheet portion and is excreted in the The fixed position of the part facing the wide side direction in the section A (see FIG. 2 (a) is distinguished from the wide side direction position of the base wall portion forming a sheet portion in the rear section B, by which the base wall portion 5 1 Upper part P 28 312 / Invention specification (Supplement) / 92-03 / 91136144 200301096 The distance L 2 to the leak-proof layer F in the rear section B is greater than the distance L1 in the facing section of the excretion site (See Fig. 2 (a)). In the example shown in Fig. 13, the base wall portion forms the multi-layer portion 58 of the sheet portion, and is formed on the leak-proof layer, and a pocket is formed on the Between the area outside the absorbent layer and the foundation wall part 51 in the rear section. The sanitary napkin of this example can exhibit excellent leak-proof effects, especially when there is a large amount of excretion flowing out. As explained above It is demonstrated that in the first specific example and the form shown in FIG. 13 'the foundation wall portion is formed into a sheet The fixed positions in the wide-edge direction are distinguished from each other, and the leak-proof wall of the absorbent article is also distinguished in the raised position in the wide-edge direction. Also, in the sanitary napkin 1 in the first specific example, although The leakage preventing sheet 10 is located at the rear end section D in the longitudinal direction, and the leakage preventing sheet may be placed at the front end section C or at the front end section C and the rear end section D. In a specific example, The omitted part, and the only and important point of a specific example, can be appropriately applied to other specific examples. It should be noted that the absorbent article according to the present invention can be adult diapers, Sanitary pads, disposable diapers, etc. As fully explained above, the absorbent article of the present invention has excellent applicability and leak-proof ability, and its excellent properties will not deteriorate when worn. The present invention provides Obviously, the description made here can have many changes. This change should not be regarded as departing from the spirit and scope of the present invention, and obvious modifications to those skilled in the art should be included in the scope of patent application of the present invention. Inside The scope of patents for this application covers the year 2000 on February 20, 2010. 29 312 / Invention Specification (Supplement) / 92-03 / 91136144 200301096 Japanese Patent Application Nos. 2001-388202 and 2002 Application No. 2 0 0 2-2 7 2 2 4 1 filed on September 18, incorporated herein by reference

Cljll 〇 [Schematic description] The present invention will be described with particular reference to the attached drawings, in which: Figure 1 is a plan view of a sanitary napkin according to the first specific example of the present invention, viewed from the top sheet in its natural state Figures 2 (a) and 2 (b) are schematic diagrams illustrating the various sections of the leak-proof wall of the sanitary napkin of FIG. 1, and FIG. 2 (a) is a cross-sectional view taken from the χ_χ line of FIG. b) is a cross-sectional view taken from line Y-Y in FIG. 1; FIG. 3 is a rough perspective view of the sanitary napkin of FIG. 1 in a natural state; and FIG. 4 is an elastic expandable / contractable forming the leakproof wall A perspective view of the components; FIG. 5 is a plan view of a sanitary napkin according to a second specific example of the present invention, viewed from one side of a top sheet in a natural state; FIGS. 6 (a) and 6 (b) are schematic diagrams, exemplary views Fig. 6 (a) is a cross-sectional view taken from line ZZ in Fig. 5, and Fig. 6 (b) is a cross-sectional view taken from line YY of Fig. 5; 5 is a rough perspective view of the sanitary napkin in the natural state; FIG. 8 is a plan view of the sanitary napkin according to the third specific example of the present invention, viewed from the side of the top sheet in the natural state Figures 9 (a), 9 (b), and 9 (c) are schematic diagrams illustrating the sections of the tampon-leak-proof wall of Fig. 8 and Fig. 9 (a) is taken from line I-1 of Fig. 8 Figure 9 (b) is a sectional view taken from line 11-11 of Figure 8, and Figure 9 (c) is taken from 30 312 / Invention Specification (Supplement V92-〇3 / 9l 136144 200301096) 8 111 -111 cross-sectional view; Η 10 is a rough perspective view of the sanitary napkin in the natural state of Fig. 8; Figs. H (a), u (b), and 11 (c) are schematic diagrams for demonstration. Figure 1 1 (a) is a diagram showing a state in which a sanitary napkin is placed on a packaging material, and FIG. 1 (b) is a folding of the sanitary napkin and the packaging material in a longitudinal direction. The state diagram, and Figure 11 (c) is the state of the tampon ~ the project packaging is completed; Figures 12 (a) and 12 (b) are schematic diagrams of another leak-proof wall form; and Figure 13 is a section The figure illustrates an important part of a sanitary napkin according to another specific example of the present invention. (Description of element symbols) 1 Sanitary napkin 1 ′ Sanitary napkin 1 ”Sanitary napkin 2 Top sheet 3 Back sheet 4 Absorbent core 5 Leak-proof wall 6 Edge hanging 7 wing (1 ) 8-end closing portion 9 Elastic member 10 Leak-proof sheet 10a 10 Edge portion 31 312 / Instruction manual (Supplement) / 92-03 / 9113 6144 200301096 11 1 ο Fixing place 12 Adhesive 13 Thermal seal 14 Packaging material 15 Label tape 2 1 Edge portion 5 0 Elastic expandable / shrinkable member 5 0 'Elastic expandable / shrinkable member 5 〇 Α No 5 8 Forming portion 50a 5 0 5 Vertically opposite end portion 5 0B 58 Forming portion 5 0b 5 0 'longitudinally opposite end portion 5 1 base end portion 5 2 elastically expandable / contractable portion 5 2a inwardly extending area 5 2b outwardly extending area 53 foundation wall portion forming sheet portion 54 end portion 5 5 the other end Part 56 Central fixed part 5 7 Side end part 58 Multi-layer part 71 Base part of the wing A Excretion part facing segment 312 / Invention specification (Supplement) / 92-03 / 91136144 200301096 B Rear segment C Front segment D Rear segment E Absorption layer F Leak-proof layer I The connection is shown in Figure 9 (a) Section II The connection is shown in Figure 9 (b) Section III The connection is shown in Figure 9 (c) The distance L 1 between P and A between section 1 and 3 The distance L2 is the distance between 3 of P and B. The length of the forming part L3 is 58. The total length of the bulge.

La fold line

Lb fold line

Lc Fold line P 5 1 Upper end portion Q 5 1 Lower end portion W 5 2 Width distance W 2 Fixed width X The line is shown in Figure 2 (a) section Y line is shown in Figure 2 (b) section, or Figure 6 (b) Section Z is connected as shown in Figure 6 (a) 33

312 / Invention Specification (Supplement) / 92-03 / 91136144

Claims (1)

200301096 Patent application scope 1 · An absorbent article comprising a liquid-retaining absorbent layer and a liquid-impermeable leak-proof layer, and in its longitudinal direction, including an excretory part facing section, when worn, , Placed on the opposite side of the liquid excretion site of a wearer, and a rear section, when worn, placed behind the excretion site facing section, one of the leak-proof walls is placed on the opposite side of the longitudinal direction, The leakproof wall includes a foundation wall portion and a planar elastic expandable / contractible portion, which is connected to the upper end portion of the foundation wall portion and bulges in the facing section and the rear section of the excretion site, and from the foundation. The distance from the upper end of one of the wall portions to the leak-proof layer in the rear section is a considerable distance from one of the facing sections in the excretion portion. 2. For an absorbent article in the scope of application for patent i, The leak wall includes a central fixed portion, where the leak wall has no bulge, and is located between the facing section of the excretion site and the rear section. 3. The absorbent article according to item 1 of the patent application scope, wherein the elastically expandable / contractible portion in the rear section is fixed to the absorbent article at an edge portion outside the wide edge direction of the absorbent article On a building block. 4. The absorbent article according to item i of the patent application scope, wherein the elastically expandable / contractible portion includes an inwardly extending region that extends inwardly from an upper end portion of the foundation wall portion in a broad side direction of the absorbent article And an outwardly extending area extending outwardly from an upper end portion in the broad side direction of the absorbent article 0 34 312 / Invention Specification (Supplement) / 92-03 / 91136144 200301096 5. An absorbent article, wherein the leak-proof wall is formed by fixing an elastic expandable / contractible member to another constituent member of the absorbent article, and the elastic member includes a foundation wall having a certain width in a longitudinal direction. The sheet portion is partially formed, and the elastically expandable / contractable portion is connected to the foundation wall portion in a wide-side direction to form one end portion of the sheet portion, and the sheet is formed by the foundation wall portion in the excavation facing portion. One of the fixed positions in the wide side direction is separated, so that the distance from an upper end portion of the foundation wall portion to the leak-proof layer in the rear section is greater than the excretion site. One segment of the relatively short distance, thus the lower end portion of one wall of the base portion to the one upper end portion of the rear section per distance, less than the excretion portion facing one considerable distance segment. 6. The absorbent article according to item 1 of the patent application scope, wherein the leak-proof wall is formed by fixing an elastic expandable / contractible member to another constituent member of the absorbent article, and the elastic member includes a The foundation wall portion having a certain width in the longitudinal direction forms a sheet portion, and the elastically expandable / contractable portion is connected to the foundation wall portion in a wide side direction to form one end portion of the sheet portion. Further, by providing a multi-layer portion on the The base end portion in the rear segment forms a part of the sheet portion, and the distance from the upper end portion of one of the foundation wall portions to the leak-proof layer in the rear segment is considerably shorter than one of the facing portions in the excretion site. 7 · If the absorbent article according to item 1 of the patent application scope, wherein the leak-proof sheet is placed on the skin-contacting surface edge of one of the front end section and / or the rear end section of the absorbent article in the longitudinal direction, the leak-proof sheet is The elastically expandable / contractible portion fixed to the raised leak-proof wall makes the leak-proof sheet on the side of the central portion of the absorbent article 35 312 / Invention Specification (Supplement) / 92-03 / 91136144 200301096 direction An edge portion is separated from the absorbing layer. 8. A method for manufacturing an absorbent article, the absorbent article comprising a liquid-retaining absorbent layer, a liquid-impermeable leak-proof layer, and a leak-proof wall on the opposite edge of the absorbent layer, the leak-proof wall comprising A foundation wall portion and a planar elastic expandable / contractible portion are connected to the upper end portion of the foundation wall portion, and bulge in a segment facing the excretion portion. When worn, liquid is discharged from a wearer Opposite the part, and a rear section, placed behind the facing part of the excretory part when worn, and the distance from the upper end of one of the foundation wall parts to the leak-proof layer in the rear part is more than facing the excretory part. A considerable distance in one of the segments is short. The manufacturing method of an absorbent article includes a step of manufacturing a main body, the main body including the absorbing layer or the absorbing layer and the leak-proof layer; a manufacturing elastic expandable / contractible A step of forming a member including a base wall portion having a certain width in a longitudinal direction to form a sheet portion, and the elastically expandable / contractable portion is connected to the base wall portion in a wide side shape An end portion of the sheet portion; and a step of forming the base wall portion of the elastically expandable / contractable member into a sheet and fixing to the opposite side portion of the main body such that the base wall portion in the facing portion of the excretion portion is formed A fixed position of the sheet part 'and a fixed position of the base wall part forming the sheet part in the rear section can be distinguished. 9. The method for manufacturing an absorbent article according to item 8 of the scope of patent application, wherein in the manufacturing step of manufacturing the elastically expandable / contractible member, a plurality of layers are formed on the foundation wall portion in the rear section to form a sheet portion. Part 36 312 / Invention Specification (Supplement) / 92-03 / 91136144 200301096. 1 〇. A method for manufacturing an absorbent article, the absorbent article includes a liquid retaining absorbent layer, a liquid impermeable leak-proof layer, and a leak-proof wall located on the opposite edge of the absorbent layer, the leak-proof wall comprising A foundation wall portion and a planar elastic expandable / contractible portion are connected to the upper end portion of the foundation wall portion and bulge in the facing portion at an excretion site. When worn, liquid is excreted by a wearer Opposite the part, and a rear section is worn further behind than the facing part of the excretion part when worn, and the distance from an upper end part of the foundation wall part to the leak-proof layer in the rear part is more than facing the excretion part. A considerable distance in one of the segments is short. The manufacturing method of the absorbent article includes a step of manufacturing a main body, the main body including the absorbing layer or the absorbing layer and the leak-proof layer; A step of contracting a member including a base wall portion having a certain width in a longitudinal direction to form a sheet portion, and the elastically expandable / shrinkable portion is connected to the base wall portion in a wide side direction Forming one end portion of the sheet portion; and a step of forming the base wall portion of the elastic expandable / contractible member into a sheet, and fixing the base wall portion of the main body to form the other end portion of the sheet portion or a vicinity thereof; a Forming a multi-layer portion having a predetermined distance in the longitudinal direction of the elastically expandable / contractible member at an area where the elastically expandable / contractable member is located in the rear wall of the foundation wall portion forming a sheet portion Steps; and a step of fixing a longitudinally opposite end portion of the elastically expandable / contractible member to the main body. 37 312 / Invention Specification (Supplement) / 92-03 / 91136144